UCL  IRIS
Institutional Research Information Service
UCL Logo
Please report any queries concerning the funding data shown on the profile page to:

http://www.ucl.ac.uk/finance/secure/research/post_award
Please report any queries concerning the student data shown on the profile page to:

Email: portico-services@ucl.ac.uk

Help Desk: http://www.ucl.ac.uk/ras/portico/helpdesk
Publication Detail
Fluid-structure coupling in valveless micropumps
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    Azarbadegan A, Eames I, Wojcik A
  • Publisher:
    IOP PUBLISHING LTD
  • Publication date:
    08/2011
  • Journal:
    J MICROMECH MICROENG
  • Volume:
    21
  • Issue:
    8
  • Print ISSN:
    0960-1317
  • Language:
    EN
  • Keywords:
    LESS PUMP, DYNAMIC-MODEL, PERFORMANCE
  • Addresses:
    Azarbadegan, A
    UCL
    London
    WC1E 7JE
    England
Abstract
Valveless micropumps work on the principle that the reciprocal forcing of fluid by an actuator through diffuser/nozzle elements generates a rectified mean flow. The pump characteristics depend on the coupling between the fluid and structure. We analyze the characteristics of valveless micropumps by developing a coupled model for the area-averaged membrane displacement and the rectified flow through the diffuser/nozzle elements. Analytical expressions are derived for the pump flow rate Q and pressure drop Delta P characteristics as functions of the forcing frequency. The predicted natural angular frequency is compared against published results and the agreement is reasonable. The model shows that the maximum flow rate Q(max) satisfies Q(max) similar to omega for omega/omega(N) < 1, and Q(max) similar to 1/omega for omega/omega(N) > 1, which is supported by published experimental data. The maximum pressure Delta P-max satisfies Delta P-max similar to omega(2) for omega/omega(N) < 1, Delta P-max similar to 1/omega(2) for omega/omega(N) > 1. The available experimental data are sparse (in comparison to Qmax). The general model is applicable to all valveless micropumps which incorporate diffuser/nozzle elements.
Publication data is maintained in RPS. Visit https://rps.ucl.ac.uk
 More search options
UCL Authors
Dept of Mechanical Engineering
Dept of Mechanical Engineering
University College London - Gower Street - London - WC1E 6BT Tel:+44 (0)20 7679 2000

© UCL 1999–2011

Search by